寻找对 LSAT-12-2-11，LSAT-12-2-12 的指教，谢惠顾

srzhang · 发表于 2004-1-15 01:52:00

12-2-11, The labeling of otherwise high-calorie foods as "sugar-free," based on the replacement of all sugar by artificial sweeteners, should be prohibited by law. Such a prohibition is indicated because many consumers who need to lose weight will interpret the label "sugar-free" as synonymous with "low in calories" and harm themselves by building weight-loss diets around foods labeled "sugar-free." Manufacturers of sugar-free foods are well aware of this tendency on the part of consumers.

Which one of the following, if true, provides the strongest basis for challenging the conclusion in the passage?

(A) Food manufacturers would respond to a ban on the label "sugar-free' by reducing the calories in sugar-free products by enough to be able to promote those products as diet foods.

(B) Individuals who are diabetic need to be able to identify products that contain no sugar by reference to product labels that expressly state that the product contains no sugar.

(C) Consumers are sometimes slow to notice changes in product labels unless those changes are themselves well advertised.

(D) Consumers who have chosen a particular weight-loss diet tend to persist with this diet if they have been warned not to expect very quick results.

(E) Exactly what appears on a product label is less important to consumer behavior than is the relative visual prominence of the different pieces of information that the label contains.

12-2-12. In the Centerville Botanical Gardens, all tulip trees are older than any maples. A majority, but not all, of the garden's sycamores are older than any of its maples. All the garden's maples are older than any of its dogwoods.

If the statements above are true, which one of the following must also be true of trees in the Centerville Botanical Gardens?

(A) Some dogwoods are as old as the youngest tulip trees.

(B) Some dogwoods are as old as the youngest sycamores.

(C) Some sycamores are not as old as the oldest dogwoods.

(D) Some tulip trees are not as old as the oldest sycamores.

(E) Some sycamores are not as old as the youngest tulip trees.

srzhang · 发表于 2004-1-15 06:56:00

Anybody help ???!!! Please

qww · 发表于 2004-1-15 09:42:00

11A,enough to be able to promote those products as diet foods。说明制造商能够提高这些产品满足低热产品的要求。所以不能说标“suger-free"的产品就是愚弄消费者，因为此类产品满足低热的要求。
12C.
all t>all M > all d
部分 S > all M > all d.
CSome sycamores are not as old as the oldest dogwoods。注意C的取非是所有 S as old as the oldest dogwoods.这与原题的前提矛盾。

srzhang · 发表于 2004-1-16 00:57:00

回QWW，12-2-11的答案为B，我又想了下，好像有些道理；因为该题的结论好像应该是第一句话 The labeling of ...."sugar-free".....should be prohibited by law。而11题提问是challenging the conclusion，所以应该为提倡不能禁止 the labeling of "sugar-free"，这样一来B就有道理，如果一禁止，糖尿病人就无法过日子。

12-2-12 我也是选C，我觉得答案的 E 应该有问题

must750 · 发表于 2004-1-16 03:59:00

I select E for question 12

1. "all tulip trees are older than any maples"
=> the youngest tulip trees are older than any maples

2. "A majority, but not all, of the garden's sycamores are older than any of its maples"
=> some sycamores are not older than any maples

1 & 2 => Some sycamores are not as old as the youngest tulip trees

srzhang · 发表于 2004-1-16 12:05:00

must750, 请帮指教一下怎样排除 B 和 C，LSAT有不少这种推导题，是否设计逻辑学的一些精辟理论？

番茄炒蛋 · 发表于 2004-1-17 11:34:00

12题很怪，我觉得没哪个是对的
原文有一句话all tulip trees are older than any maples. A majority, but not all, of the garden's sycamores are older than any of its maples
虽然说了大部分的s是比m大的，但没有说S中最小的到底是比M中最小的大呢还是小?
而如果S的下界比M小，那么D的上界和S的下界又怎么确定呢？
这样就出了问题，虽然D是比M小的,可是由于S的最小边界无法确定，那么D的最大值和S的最小值就无法比较
而且按原文的意思，S的上界与T的下界也无法确定，可能会有重合也可能没有
如此一来，大家可以画个草图，原文里所以的选项都可以被推翻
应该只有E是正确的吧

[此贴子已经被作者于2004-1-18 9:54:23编辑过]

kid · 发表于 2004-1-18 00:31:00

12
T>M
s>M
M>D
if "not all, of the garden's sycamores are older than any of its maples"
then some of the s < m
and since the T are all > M
some s are younger than t

mariezhu · 发表于 2004-1-18 06:09:00

11,题中认为如果在产品中用甜味剂取代糖，并在标签上标明无糖，就会误导需要减肥的消费者，所以必须在法律上取缔这种行为，那么要weaken这一结论，最好的就是说其实消费者有自行辨别的能力，不会被误导，所以B Individuals who are diabetic need to be able to identify products that contain no sugar by reference to product labels that expressly state that the product contains no sugar是正确的。
12，注意C和D都是在某些情况下“有可能”正确的，但是只有E是肯定正确的（must be true）
T>M
S (maj) > M => some S < M
then the youngest T MUST be older than some S
which means “Some sycamores are not as old as the youngest tulip trees.” E

[此贴子已经被作者于2004-1-21 2:19:54编辑过]

寻找对 LSAT-12-2-11，LSAT-12-2-12 的指教，谢惠顾

寻找对 LSAT-12-2-11，LSAT-12-2-12 的指教，谢惠顾

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